NWG/RFC# 736 MRC 31-OCT-77 23:28 42213
Telnet SUPDUP Option
Network Working Group Mark Crispin
Request for Comments 736 SU-AI
NIC 42213 31 October 1977
TELNET SUPDUP Option1. Command name and code.
SUPDUP 21
2. Command meanings.
IAC WILL SUPDUP
The sender of this command REQUESTS permission to, or confirms
that it will, use the SUPDUP display protocol
IAC WON'T SUPDUP
The sender of this command REFUSES to use the SUPDUP protocol.
IAC DO SUPDUP
The sender of this command REQUESTS that the receiver use, or
grants the receiver permission to use, the SUPDUP protocol.
IAC DON'T
The sender of this command DEMANDS that the receiver not use the
SUPDUP protocol.
3. Default.
WON'T SUPDUP
DON'T SUPDUP
i.e., the SUPDUP display protocol is not in use.
Mark Crispin [page 1]